Push vs. popunder: choosing the right traffic format in 2026

The short answer

If your offer needs a single strong hook and a fast decision, start with popunder. If it needs repetition, re-engagement or a softer nudge, start with push. Most performance advertisers eventually run both, but they should not start with both.

What actually differs

Popunder owns the full page. The user finishes an article, closes a tab, and your landing page is there. Attention is broad but shallow: you have one screen to make the offer obvious.

Push arrives on the lock screen or notification tray. It is smaller, easier to ignore, and much cheaper per impression. It works when the message is specific and the audience has already shown interest in the category.

• Popunder: best for sweepstakes, betting, utilities and direct-response offers with an instant promise.
• Push: best for re-engagement, iGaming, app installs and offers that benefit from repeated exposure.

The mistake we see most

Advertisers judge both formats on click-through rate. That number is almost meaningless on its own. A popunder campaign with a 0.4% CTR can beat a push campaign with a 3% CTR if the downstream event is stronger.

Set the optimisation event before you launch — first deposit, funded account, purchase, verified registration — and compare formats on cost per event, not cost per click.

A simple testing plan

Run one format at a time for the first week, with the same offer and similar GEOs. Keep creative constant so the format is the only variable. After seven days, move 70% of budget to the winner and use the remaining 30% to test the second format.

That is it. No elaborate matrix, no twelve-way split. Formats are a blunt instrument; creative and source quality decide the outcome.